Metal mold



Patented Apr. 3, 1923.

UNITED STATES 1,4503% PATENT OFFICE.

HUBERT A. MYERS, or TOLEDO, 01110, ASSIGNOR To THE HUBERT' A. MYERS COMPANY,

- 0F TOLEDO, OHIO, A CORPORATION or 01110.

METAL No Drawing.

To all whom it may. concern:

Be it known that I, HUBER'I' A MYERS, acitizen of the United States, and a resident of Toledo, in the county of Lucas and State of Ohio, have made an Invention Appertaining to Metal Molds; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use thesame,

The object of my invention is to provide an eflicient permanent iron mold orimold containing iron that may be readily constructed and shaped and wherein smooth. perfect metal castings may be formed, My invention particularlyf-has for its object to form a machinable alloy or mixture containing iron for molds that maybe used for rapidly casting metals, particularly ferrous metals, over a long period without deterioration of the molds.

' In order that iron molds for casting metals, particularly ferrous metals. may be durable, they should be formed of an iron low in silicon and carbon. Otherwise the silica at the surface will be fused by the repeated application of the heat of molten metal and cause pitting of the surface of the matrix. Also high carbon iron will not withstand the constant or rapid changes in temperature that such molds are-subjected to without warping or cracking. Low silicon and low carbon iron, however, are dillicult to 'work and machine. Furthermore, iron molds may be treated or lined with materials. to protect them from the effect of heated metals. which treatments sometimes cause slight softening of the moldingv surface.

-These objectionable features I have overcome by forming a mixture or alloy of low carbon and low silicon iron. a small amount of manganese. not to exceed 2% of manganese, which greatly reduces injurious ther- ,mal effects produced by temperature changes, such as that caused by rapid expansion and contraction. and asmall amount of nickel. not to exceed 20%, which operates to soften the iron so as to make itsliapable or machinable and at the same time stiffens the surface as against any action of the lin ing or surfacing material that may be used to protect the surface of the mold from the molten metal inserted in the mold. If desired, the manganese maybe omitted, but I MOLD.

. Application filed January 14=, 1922. Serial No. 529,381.

find it preferable to use the small amount of manganese designated. 1

In forming the molds embodying my invention I make a mixtureor an alloy, which is hereinafter described broadly as an alloy, of nickel and low carbon and'low silicon iron, using a relatively small amount of nickel in the alloy. Probably the best results are obtained when the amount of the nickel is notless than 5% and not more than 15%.- However, fairly good results, are obtained by alloy formed of from 1% to 20% I of nickel and the balance of iron. To this maybe added about 1% of manganese. As much as 2% may be used. The molten metal is then poured and shaped in the manner well known in the art to form a matrix and a connecting sprue hole.

The nickel operates to stiffen or strengthen the iron while the manganese prevents warp ingof the mold,

The invention is particularly advantageous when the surfaces of the matrices are treated with zinciferous materials that may be used to prevent adherence of the metal castings, particularly ferrous metal castings, and to form smooth, perfect castings. The zinctends to weaken the iron at the surface when the iron is repeatedly treated with the materials and'heated in the casting operations. The zinciferous materials will, however. not effect the nickel but will adhere to the iron and form a protective surfacing material. The zinc is held or absorbed or attracted by the iron of the alloy. while at the same time the nickel strengthens the molds at the surfaces of the matrices.

I claim:

1. A mold for casting metals containing nickel and iron in alloyed relation.

2. A mold for casting metals formed of an alloy containing nickel and iron.

3. A mold for casting metals and containing iron and from 5% to 15% of-nickel.

4. A mold for casting metals and containing of from 1% to 20% of nickel and iron.

A mold for casting metals formed of an alloy containing nickel and iron, the surface of the matrix of the mold covered with a zinciferous material.

(3. A mold for casting metalsformed of an alloy. containing nickel and iron, the surface of thematrix of the mold'cov'ered with a zinciferous material.

7. A mold for casting metals and containmg iron and from 5% to 15% of nickel, the surface of the matrix of the mold covered with a zinciferous material.

8. A mold for casting metals and, containing of from 1% to 20% of nickel and iron, the surface of the matrix of the mold covered with a zinciferous material.

9. A mold for casting metals formed of an alloy containing nickel and'low carbon and silicon iron.

10. A moldfor casting metals formed of an alloy containing nickel and low carbon and silicon iron.

11. A mold for casting metals and containing low carbon and silicon iron and from 5% to 15% of nickel.

12. A mold for casting metals and containing of from 1% to 20% of nickel and low carbon and silicon iron.

13. A mold for casting metals formed of an alloy containing nickel and low carbon and silicon iron, the surface of the matrix of the mold covered with a zinciferous material.

1.4. A mold for casting metals formed of an alloy containing nickel and low carbon and silicon iron, the surface of the matrix of the mold covered with a zinciferous material.

15. A mold for casting metals and containing low carbon and silicon iron and from 5% to 15% of nickel, the surface of the matrix of the mold covered with a zinciferous material.

and a small amount of manganese.

20. A mold for casting metals and containing of from 1% to 20% of nickel, a small amount of manganese, and the balance of low. carbon iron.

21. A mold for casting metals formed of an alloy containing nickel, iron and a small amount of manganese the surface of the matrix of the mold covered with a zinciferous material.

22. A mold for casting metals formed of an alloy containing nickel, iron, and a small amount of manganese, the surface of the matrix of the mold covered with a Zinciferous material.

A mold for casting metals and containing iron and from 5% to 15% of nickel, and from {-76 to 2% of manganese, the surface of the matrix of the mold covered with a zinciferous material.

24. A mold-for casting metals and containing of from 1% to 20% of nickel, and from to 2% of manganese, and iron, the surface of the matrix of the mold covered with a zinciferous material.

25. A mold for casting metals formed of an alloy of nickel, low carbon and low silicon iron, and a small amount of manganese.

26. A mold for casting metals formed of an alloy containing nickel, low carbon and low silicon iron, and a small amount ofmanganese.

27. A mold for casting metals and containing low carbon and low silicon iron, from to 15% of nickel, and a small amount of manganese.

28. A mold for casting metals formed of an alloy of nickel, low carbon and low silicon iron, and. a small amount of manganese, the surface of the matrix of the mold covered wlth a zinciferous material.

29. A mold for casting metals formed of an alloy containing nickel, low carbdn and low silicon iron, and a small amount of manganese, the surface of the matrix of the mold covered with a zinciferous material.

30. A mold for casting metals and containing low carbon and low silicon iron, and from 5% to- 15% of nickel, and from l to 2% of manganese, the surface of the matrix of the mold covered with a zinciferous material.

31. A mold for casting metals and containing of from 1% to 20% of nickel and from to 2% of manganese, and the balance of low carbon and low silicon iron, the

surface of the matrix of the mold covered with a zinciferous material.

In testimony whereof, Ihave hereunto signed my name to this specification.

HUBERT A. MY-ER-S. 

